call_temporal_condition_macro_once

Calling a def temporal condition macro inside a when temporal { … } block. macros.dw defines once(?w, ?s) as a thin wrapper over formerly within ?w ?s; the policy calls it with a bare interval literal window arg (1h, no within keyword) and a Read request pattern as the predicate arg — pinning input.user and input.document to the current request’s context.

Net effect: permit a Write only if the same user recently Read the same document (within 1h). The trace shows both outcomes:

• @0 — Read of doc1 by alice (history-only here; no Write permit applies, so the decision is a deny).
• @10 — alice writes doc1, 10s after the read → allow (matching read is within the window and pins both user and document).
• @20 — alice writes doc2, which she never read → deny.

Referenced by guide/09-calling-macros.md.

Policy

// Calling a `def temporal` CONDITION macro inside when temporal { … }.
// `once` wraps a window + a predicate; the window arg is a BARE
// interval literal (1h, no `within` keyword) and the predicate arg is
// a Read response pattern.
@id("write_after_recent_read")
permit (principal, action == Drupe::Action::"Write", resource)
when temporal {
    once(1h, Drupe::Action::"Read"::response{
        input.user: context.input.user,
        input.document: context.input.document
    })
};

Schema

namespace Drupe {
  type ApproveInput = {
    approver: String,
    request_id: String
  };

  type ApproveOutput = {
    result: Bool
  };

  type ContentFilterFinding = {
    severityScore: decimal
  };

  type LoginInput = {
    server: String,
    user: String
  };

  type LoginOutput = {
    result: Bool
  };

  type LogoutInput = {
    server: String,
    user: String
  };

  type LogoutOutput = {
    result: Bool
  };

  type PromptAttackFinding = {
    severityScore: decimal
  };

  type ReadInput = {
    document: String,
    user: String
  };

  type ReadOutput = {
    result: Bool
  };

  type SensitiveInfoFinding = {
    confidenceScore: decimal
  };

  type SubmitInput = {
    request_id: String,
    user: String
  };

  type SubmitOutput = {
    result: Bool
  };

  type SystemContext = {
    now: datetime
  };

  type WriteInput = {
    document: String,
    user: String
  };

  type WriteOutput = {
    result: Bool
  };

  entity Gateway;

  entity IamEntity = {
    id: String
  };

  entity OAuthUser = {
    id: String
  } tags String;

  entity UnauthenticatedUser;

  action "Approve" in [Action::"CallTool"] appliesTo {
    principal: [IamEntity, OAuthUser, UnauthenticatedUser],
    resource: [Gateway],
    context: {
      input: ApproveInput,
      output?: ApproveOutput,
      system: SystemContext
    }
  };

  action "CallTool" in [Action::"Mcp"] appliesTo {
    principal: [OAuthUser, IamEntity, UnauthenticatedUser],
    resource: [Gateway],
    context: {
      system: SystemContext
    }
  };

  action "Http" appliesTo {
    principal: [OAuthUser, IamEntity, UnauthenticatedUser],
    resource: [Gateway],
    context: {
      system: SystemContext
    }
  };

  action "InvokeAgent" in [Action::"Http"] appliesTo {
    principal: [OAuthUser, IamEntity, UnauthenticatedUser],
    resource: [Gateway],
    context: {
      input?: {      },
      system: SystemContext
    }
  };

  action "InvokeLLM" in [Action::"Http"] appliesTo {
    principal: [OAuthUser, IamEntity, UnauthenticatedUser],
    resource: [Gateway],
    context: {
      input?: {      },
      system: SystemContext
    }
  };

  action "Login" in [Action::"CallTool"] appliesTo {
    principal: [IamEntity, OAuthUser, UnauthenticatedUser],
    resource: [Gateway],
    context: {
      input: LoginInput,
      output?: LoginOutput,
      system: SystemContext
    }
  };

  action "Logout" in [Action::"CallTool"] appliesTo {
    principal: [IamEntity, OAuthUser, UnauthenticatedUser],
    resource: [Gateway],
    context: {
      input: LogoutInput,
      output?: LogoutOutput,
      system: SystemContext
    }
  };

  action "Mcp" appliesTo {
    principal: [OAuthUser, IamEntity, UnauthenticatedUser],
    resource: [Gateway],
    context: {
      system: SystemContext
    }
  };

  action "Read" in [Action::"CallTool"] appliesTo {
    principal: [IamEntity, OAuthUser, UnauthenticatedUser],
    resource: [Gateway],
    context: {
      input: ReadInput,
      output?: ReadOutput,
      system: SystemContext
    }
  };

  action "Submit" in [Action::"CallTool"] appliesTo {
    principal: [IamEntity, OAuthUser, UnauthenticatedUser],
    resource: [Gateway],
    context: {
      input: SubmitInput,
      output?: SubmitOutput,
      system: SystemContext
    }
  };

  action "UnknownTool" in [Action::"CallTool"] appliesTo {
    principal: [OAuthUser, IamEntity, UnauthenticatedUser],
    resource: [Gateway],
    context: {
      system: SystemContext
    }
  };

  action "Write" in [Action::"CallTool"] appliesTo {
    principal: [IamEntity, OAuthUser, UnauthenticatedUser],
    resource: [Gateway],
    context: {
      input: WriteInput,
      output?: WriteOutput,
      system: SystemContext
    }
  };
}

Trace

@0 scope(principal: Drupe::OAuthUser::"alice", resource: Drupe::Gateway::"gw1") request_context(input: { document: "doc1", user: "alice" }) Drupe::Action::"Read"::request(input: { document: "doc1", user: "alice" }, callerPrincipal: Drupe::OAuthUser::"alice", callerResource: Drupe::Gateway::"gw1", requestId: "u1")
@1 scope(principal: Drupe::OAuthUser::"alice", resource: Drupe::Gateway::"gw1") Drupe::Action::"Read"::response(input: { document: "doc1", user: "alice" }, output: { result: true }, callerPrincipal: Drupe::OAuthUser::"alice", callerResource: Drupe::Gateway::"gw1", requestId: "u1")
@10 scope(principal: Drupe::OAuthUser::"alice", resource: Drupe::Gateway::"gw1") request_context(input: { document: "doc1", user: "alice" }) Drupe::Action::"Write"::request(input: { document: "doc1", user: "alice" }, callerPrincipal: Drupe::OAuthUser::"alice", callerResource: Drupe::Gateway::"gw1", requestId: "u2")
@20 scope(principal: Drupe::OAuthUser::"alice", resource: Drupe::Gateway::"gw1") request_context(input: { document: "doc2", user: "alice" }) Drupe::Action::"Write"::request(input: { document: "doc2", user: "alice" }, callerPrincipal: Drupe::OAuthUser::"alice", callerResource: Drupe::Gateway::"gw1", requestId: "u3")

Expected Output

@0 (time point 0): DENY
@10 (time point 1): ALLOW  [rules: 0]
@20 (time point 2): DENY

Macros

def temporal once(?w, ?s) { formerly within ?w ?s };